My heated bed no longer heats up. I've tried replacing the thermistor on it with no success. This tells me one of two things (1) it's something in the bed and it should be replaced. (2) The PCB with the circuit for the bed thermistor is fried and the PCB needs repalcing.
I'm trying to troubleshoot this in my spare time so if anyone has ideas, I would appreciate it. This is my ABS printer as it is highlysuccessful with ABS (I have plexiglass cover all around this guy and need to get it working again soon.